Which of the following box is at the top?

Answer the questions based on the information given below. Eight boxes viz. A, B, C, W, X, Y, Z and Q are placed one above the other in the single stack, but not necessarily in the same order. The lowermost box is numbered 1 and the box above is numbered 2 and so on. The consecutive alphabetically named boxes were not placed adjacent to each other. Three boxes are placed between Q and Z where neither of them is placed at the top and bottommost position. Two boxes are placed between Y and C where box C is placed immediately below box Q. Box A is placed immediately above box
X.At least three boxes are there between B and W which is not placed at the bottommost position.